Mold breaker



June, 10, 1930.

J. SCHERNER MOLD BREAKER Filed Nov. 17, 1926 3 Sheecs- Sheet 1 In yen-For" June 10, 1930. J. |SCHERNER MOLD BREAKER s Sheets-Shee t 2 Filed Nov. 17, 1926 r ow Pi LFJN M 1 L 1. kw R .0 n m rm m A, w

22mm Ali-0mg J. SCHERNER June 10, 1930.

MOLD BREAKER 5 Sheets-Sheet 3 John schar'ner- Filed Nov. 1'7, 1926 Patented June 10, 1930 ,s UNIT-ED srA-TEs .VVPAQTFEFQNT OFFICE JOHN SCHERNER, or MILWAUK E," isconsin, ASSIGNORITQ :TI-IE rIsK RUBBER COMPANY, or .cHIoo'rEE. FALLS, MASSACHUSETTS; A coerce-Arron or" MASSA- CHUSET'IS v MoLD BREAKER Application-filed ovember 17,1926. serial No.143,938.-

My invention relates to thevulcanizatio-n of pneumatictire casings and more particularly to means for-opening the 'moldsand removing the cured casings. Among its objects is to-provide a device which maybeused in connection withrmold conveyor systems now in use and to. provide adevice in which the mold halves when separated: are in position for handlingbythe equipment usually associated with present conveying systems. A further object is to provide a, device continuous in operation and adaptable to condriven by a suitablegearchain10' from a motor or other source of power not'shown. As best shown n Figures 1 and 9- the hooks 6 are pivoted at 111 to plates 12 suitably secured to thejchain 7. The length .-of these hooks isipreferably made adjustable as ,indi-' cated at 1a in Figure 9, to acc0mm0datevarying sizes of molds. The hooks are provided tinuous conveying systems. Other and further objects will be apparent from the following. specification and claims. 1

In the accompanying drawings which illustrate one embodimentof the invention 7 Figure 1 is" a side elevation "of the device, showing the molds in section,

' Figure 2 is a plan viewwith the overhead I conveyor and a portion of the frame removed, Figure 3 is a detail 'of the stationary mold opening wedge,

Figure 4 is a section on line 44 of Fig- Figures 5 and 6 are details of theadjustable wedges,

Figure 7 is a section substantially on the line 77"of Figure 1, Y

Figure Skis a section substantiallyon line 88 of Figurel, and 3 .Figure 9 is a detail of one ofthe, Conveyor hooks. I

Referring to the drawings 1 designates the at. their free end with recesses 16 adapted to engage the inner circumference of thebead rings 17 and to draw the mold tothe opening devices later described. The hook is. held in operative positionby latch 19 pivoted at 20, between plates 12 provided with a shoulder 21 adapted'to engage lug; 22 formedinte gral with hook 6. Innormal positon as shown in Figure 9 shoulder 21' prevents hook 6 from rearwardmovementabout its pivot 11. I After the mold has been carried through the o'peningdevices, it is desirable to release hooks ,6 to permit disengagement. ofthe recess 16 from the bead ring 17 and this is accomplished by means of a cam member 23 1) secured to the frame 1- and adaptedv to engage a pin 24 projecting from latch 19 to'raise the latter and disengage shoulder swingabout pivot 11 to a horizontal position 21,; andflug 22i permitting hooks 6 toswing rearwardly under the action of gravity as shownon the rightin said figure. Asdthehooks move upwardly around sprocket 9 they .-as shown in Figure 1", pin 24 of: latch 19 slidmain frame of the. device, said. frame being generally rectangular inshape and' adapted I to bridgea conveyor lndicatedat 2 which latter. forms part ofthe general .conveyor systemfor. handling, molds and in itself forms no.

' anauxiliary conveyor indicated in Figure l part of the invention. I preferably provide at 3 for elevating the'incoming molds above the conveyorz2. This auxiliary conveyormay be of. any suitable form'and as shown com prises a set Qof suitably driven rolls supportedupon aframework 5. YVhen in proper ing along a guide rail 25.- As the hooks round the: sprocket '8 they fall a verticalposition, latch .19 dr0pping intoposition to lock the hop kjinf 'operativeposition. The links; of V chains are provided with rollers 26 (see Figtires-7 and 8) adapted to run on upperand lower rails 27 i and 28 supported by {hangers 29 from theframe of the machine. The dewedge-member 30 secured to; framef'l and wedge members 31' and32secured respectively; to A frames 34and 35 pivotediat .36 and 37 toiframe 1. As indicated in Figure Tthe position on the auxiliary, conveyor 3 the.

molds are engaged by hooks 6 carried on over- ,1

A frames are urged inwardly as .by a weight 38 secured to a cables39 running o-ver pulley so and seq dftqth t pd e i n f- Th head sprocket. chains .7- engaging sprockets inwardlimitofmovement of the A fraiiie s iis '8and 9, supported. from the mainv frame 1,

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ter "engaging a sprocket veyor.

41 secured to cable 42 running over pulley a3 and secured to the A frame. It will be understood that any suitable means for yieldingly securing the A frames in adjusted position may be substituted for the weights 38 and pulleys 11. The object of mounting Wedges 31 and 32 on these yieldable A frames is to accommodate the device to slightvariations in the diameters of the molds of a given size and permit adjustment for-varying sized molds. Wedges 31 and could be combined into a single wedge similar to but in the interests of speed of operation it is desirable that the, spacing of hooks 6 on chain 7 should be such that 2 molds may be in the device simultaneously and to accommodate the slight variation in diameter which may exist between the two molds simultaneously in the machine the separation of one of the opening Wedges into two parts is desirable. 'As is apparent from Figures 5 and 6 wedge 32 forms a continuation of Wedge 31 and the two combined are substantially similar to wedge 30.

In order to maintain the molds in proper relation with hooks (3 it is found desirable to provide rails and 61 adapted to engagethe top of the molds as the latter engage the wedges. These rails are yieldably mounted as at 62 and 63 to the hangers 29, (see Fig- Referring to Figure 1, as the mold is advanced into the device by hooks 6 the points of Wedges 30 and 82 engage'between lugs 44 and 15 formed respectively on the upper and lower halves of the mold. The pitch of one of the wedges is made slightly steeper than the other in order that the mold may be broken open at one side in advance of the other. 'As the mold halves separate the lowcr half falls upon an incline conveyor l6 wiich carries it to conveyor 2. The upper mold half still in engagement with hooks 6 rides up the incline of the wedges and onto a conveyor Jwluch 1s formed of short rolls 48 the short rolls provlding a space 49 through which hooks 6 extend. The casing,

the'bead rings of which are still in engagement with recess 16 of the hooks, is carried thereby onto a conveyor 50 whereuponlatch 19 is'ope'rat'ed as previously described to release the hook. Conveyors 47 and 50 are preferably driven from the gear chain 10 as by sprocket 51 and sprocket chain 52 the lat- 53 mounted on the shaft of one of therolls of conveyor 47. All of the rolls of conveyors 47 and 50are driven by a sprocket chain 54 engagi11gsprockets carried the individual rolls of the'con- I claim:

1. A device of the character described com- 'prisingmeans for advancing" a loaded tire mold and relatively stationarymeans'loca-ted in the path of the 'a'dv'ancing mol'd to separate the mold halves from the tire, said mold separating means being adjustable to receive varying sizes of molds.

2. A device of the character described comprising means for advancing a loaded tire mold, means adapted to engage between the halves of the mold to separate the mold halves as the mold is advanced and means to maintain the tire inian intermediate spaced position relative to themold halves during the separation of the mold halves.

3. A device of the character described comprising means for advancing a loaded tire mold relatively stationary wedge means adapted to engage between the halves of the mold to separate the mold halves as the 'mold' is advanced and means to separate the tire from the mold halves.

4:. A device of the character described comprising means for advancing a loaded tire-1 halves of the mold to separate themold halves as the mold is advanced.

6. A device of thecharacter described oom prising means to engage the mner perlphery of a loaded tire mold to advance the latter along a predetermined path a recess formedon the advancing means adapted :toengage the flange of the tire bead ring, wedge means adapted to engage between the halves of the mold to separate the mold' ha lves as the mold is advanced and "means to disengage said recess from the flangeof the bead ring at a predetermined point in'its path of travel.

7. A deviceof the character described comprising a SONGS ofpivotedhooks adapted to engage the inner'peri'pheriesof loaded tire molds to advance the latter along a prede- 'termined path,means forlocking the hooks against movement about their pivotsnrtcesses "formed in the ends of "Said'ihO'OkS adapted to engage the flanges of the tire'ibead rings, Wedge means adapted to :engage between the halves of the molds :to separate the mold halves as the molds are advanced and means positioned in the path'of'tra-ve] ofthe'hooks to release the latter for pivotedmovement to thereby disengage said recesses from the of the-bead rings.

'8. A device of the "character described adapted to be associated with-a -mold conveying system comprising.rneansefor -advanc-' to advance ing a loaded tire mold, means adapted to en? gage between the halves of the mold to sep= arate the mold halves as the mold is ad vanced, means to maintain the tire in an-intel-mediate position relative to the mold halves during the separation of the mold halves, an inclined conveyor adapted to carry the lower half of the mold to the mold conveying system and means to present the I upper half of the mold in position to be engaged by the instrumentalities of said systems.

9. A device of the character described comprising means for advancing a loaded tire mold, and aplurality of relatively stationary wedges mounted oneither side of the path of travel of the loaded mold and positioned to engage between theedges of the mold halves to separate the latter-from the tire, the distance between the Wedges being'automatically variable to accommodate varying sizes of molds. V

10. A device of the character described comprising means for advancing a loaded a tire mold along a predetermined path, and a alurality of pairs of ooposed Wedge mem bers positioned along t-l ie'path of travel of the loaded mold, at least one of each pair of the opposed Wedges being yieldingly mounted, said Wedges being positioned to engage betiveen the edges of the'mold halves to separate the latter from the tire.

11. A device of the character described comprising means for advancing a loaded tire mold along apredetermined path,- a plurality of pairs of'opposed Wedge members positioned along the path of travel of the loaded mold at least one wedge of each pair of opposed Wedges being yieldingly mounted, said Wedges being positioned 'to engage between the edges of the mold halves to separatethe latter from the tire and means to adjust the normalspaoing of the Wedges.

In testimony whereof I have signed my name to the above specification.

JOHN SCHERNER. 

